Cooperative Institute for Marine and Atmospheric Research, University of Hawai'i at Mānoa, Honolulu, Hawaii, USA.
Department of Natural Resources and Environmental Management, University of Hawai'i at Mānoa, Honolulu, Hawaii, USA.
J Phycol. 2023 Oct;59(5):1107-1111. doi: 10.1111/jpy.13369. Epub 2023 Aug 14.
A cryptogenic, invasive-like red macroalga, Chondria tumulosa, was first observed in 2016 forming thick mats on the forereef of Manawai Atoll within Papahānaumokuākea Marine National Monument. Subsequent expeditions revealed an increased abundance of this alga. In 2021, unattached C. tumulosa was observed forming a network of dark, meandering accumulations throughout the atoll's inner lagoon. High-resolution satellite imagery revealed that these accumulations became visible in 2015 (length: ~0.74 km; area: ~0.88 km ) and increased 56-fold in length and 115-fold in area by 2021 (length: 41.32 km; area: 101.34 km ). An exponential expansion rate of ~16.02 km · y (length), ~44.75 km · y (area). This study presents the comprehensive temporal and spatial expansion of C. tumulosa accumulations for Manawai Atoll since its discovery, providing ecologist and resource managers with a proxy to gauge the overall abundance trend of this invasive-like alga.
一种起源不明的侵袭性红色大型海藻 Chondria tumulosa，于 2016 年首次在帕帕哈瑙莫夸基亚海洋国家纪念碑的曼纳瓦伊环礁前礁形成厚厚的垫子。随后的考察发现，这种海藻的数量有所增加。2021 年，观察到无附着物的 C. tumulosa 在环礁内泻湖形成了一个由深色、蜿蜒的堆积物组成的网络。高分辨率卫星图像显示，这些堆积物于 2015 年开始可见（长度：约 0.74 公里；面积：约 0.88 平方公里），到 2021 年，其长度增加了 56 倍，面积增加了 115 倍（长度：41.32 公里；面积：101.34 平方公里）。其扩展速度为每年约 16.02 公里（长度），每年约 44.75 公里（面积）。本研究全面介绍了自发现以来曼纳瓦伊环礁 C. tumulosa 堆积物的时空扩展情况，为生态学家和资源管理者提供了一个衡量这种侵袭性海藻总体丰度趋势的指标。
